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limit_netcdf.F90 @ 2031

Last change on this file since 2031 was 1907, checked in by lguez, 11 years ago

Added a copyright property to every file of the distribution, except
for the fcm files (which have their own copyright). Use svn propget on
a file to see the copyright. For instance:

$ svn propget copyright libf/phylmd/physiq.F90
Name of program: LMDZ
Creation date: 1984
Version: LMDZ5
License: CeCILL version 2
Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
See the license file in the root directory

Also added the files defining the CeCILL version 2 license, in French
and English, at the top of the LMDZ tree.

Property copyright set to
Name of program: LMDZ
Creation date: 1984
Version: LMDZ5
License: CeCILL version 2
Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
See the license file in the root directory

File size: 26.4 KB

Rev	Line
[1687]	1	!
	2	! $Id: limit_netcdf.F90 1508 2011-04-15 13:05:34Z jghattas $
	3	!-------------------------------------------------------------------------------
	4	!
	5	SUBROUTINE limit_netcdf(interbar, extrap, oldice, masque)
	6	!
	7	!-------------------------------------------------------------------------------
	8	! Author : L. Fairhead, 27/01/94
	9	!-------------------------------------------------------------------------------
	10	! Purpose: Boundary conditions files building for new model using climatologies.
	11	! Both grids have to be regular.
	12	!-------------------------------------------------------------------------------
	13	! Note: This routine is designed to work for Earth
	14	!-------------------------------------------------------------------------------
	15	! Modification history:
	16	! * 23/03/1994: Z. X. Li
	17	! * 09/1999: L. Fairhead (netcdf reading in LMDZ.3.3)
	18	! * 07/2001: P. Le Van
	19	! * 11/2009: L. Guez (ozone day & night climatos, see etat0_netcdf.F90)
	20	! * 12/2009: D. Cugnet (f77->f90, calendars, files from coupled runs)
	21	!-------------------------------------------------------------------------------
	22	USE control_mod
[1785]	23	USE indice_sol_mod
[1687]	24	#ifdef CPP_EARTH
	25	USE dimphy
	26	USE ioipsl, ONLY : ioget_year_len
	27	USE phys_state_var_mod, ONLY : pctsrf
	28	USE netcdf, ONLY : NF90_OPEN, NF90_CREATE, NF90_CLOSE, &
	29	NF90_DEF_DIM, NF90_DEF_VAR, NF90_PUT_VAR, NF90_PUT_ATT, &
	30	NF90_NOERR, NF90_NOWRITE, NF90_DOUBLE, NF90_GLOBAL, &
	31	NF90_CLOBBER, NF90_ENDDEF, NF90_UNLIMITED, NF90_FLOAT
	32	USE inter_barxy_m, only: inter_barxy
	33	#endif
	34	IMPLICIT NONE
	35	!-------------------------------------------------------------------------------
	36	! Arguments:
	37	#include "dimensions.h"
	38	#include "paramet.h"
	39	#include "iniprint.h"
	40	LOGICAL, INTENT(IN) :: interbar ! barycentric interpolation
	41	LOGICAL, INTENT(IN) :: extrap ! SST extrapolation flag
	42	LOGICAL, INTENT(IN) :: oldice ! old way ice computation
	43	REAL, DIMENSION(iip1,jjp1), INTENT(IN) :: masque ! land mask
	44	#ifndef CPP_EARTH
	45	CALL abort_gcm('limit_netcdf','Earth-specific routine, needs Earth physics',1)
	46	#else
	47	!-------------------------------------------------------------------------------
	48	! Local variables:
	49	#include "logic.h"
	50	#include "comvert.h"
	51	#include "comgeom2.h"
	52	#include "comconst.h"
	53
	54	!--- INPUT NETCDF FILES NAMES --------------------------------------------------
	55	CHARACTER(LEN=25) :: icefile, sstfile, dumstr
	56	CHARACTER(LEN=25), PARAMETER :: famipsst='amipbc_sst_1x1.nc ', &
	57	famipsic='amipbc_sic_1x1.nc ', &
	58	fcpldsst='cpl_atm_sst.nc ', &
	59	fcpldsic='cpl_atm_sic.nc ', &
	60	fhistsst='histmth_sst.nc ', &
	61	fhistsic='histmth_sic.nc ', &
	62	frugo ='Rugos.nc ', &
	63	falbe ='Albedo.nc '
	64	CHARACTER(LEN=10) :: varname
	65	!--- OUTPUT VARIABLES FOR NETCDF FILE ------------------------------------------
	66	REAL, DIMENSION(klon) :: fi_ice, verif
	67	REAL, DIMENSION(:,:), POINTER :: phy_rug=>NULL(), phy_ice=>NULL()
	68	REAL, DIMENSION(:,:), POINTER :: phy_sst=>NULL(), phy_alb=>NULL()
	69	REAL, DIMENSION(:,:), ALLOCATABLE :: phy_bil
	70	REAL, DIMENSION(:,:,:), ALLOCATABLE :: pctsrf_t
	71	INTEGER :: nbad
	72
	73	!--- VARIABLES FOR OUTPUT FILE WRITING -----------------------------------------
	74	INTEGER :: ierr, nid, ndim, ntim, k
	75	INTEGER, DIMENSION(2) :: dims
	76	INTEGER :: id_tim, id_SST, id_BILS, id_RUG, id_ALB
	77	INTEGER :: id_FOCE, id_FSIC, id_FTER, id_FLIC
	78	INTEGER :: NF90_FORMAT
	79	INTEGER :: ndays !--- Depending on the output calendar
	80
	81	!--- INITIALIZATIONS -----------------------------------------------------------
	82	#ifdef NC_DOUBLE
	83	NF90_FORMAT=NF90_DOUBLE
	84	#else
	85	NF90_FORMAT=NF90_FLOAT
	86	#endif
	87
	88	pi = 4.*ATAN(1.)
	89	rad = 6371229.
	90	daysec= 86400.
	91	omeg = 2.*pi/daysec
	92	g = 9.8
	93	kappa = 0.2857143
	94	cpp = 1004.70885
	95	dtvr = daysec/REAL(day_step)
	96	CALL inigeom
	97
	98	!--- Beware: anneeref (from gcm.def) is used to determine output time sampling
	99	ndays=ioget_year_len(anneeref)
	100
	101	!--- RUGOSITY TREATMENT --------------------------------------------------------
	102	IF (prt_level>1) WRITE(lunout,*) 'Traitement de la rugosite'
	103	varname='RUGOS'
	104	CALL get_2Dfield(frugo,varname,'RUG',interbar,ndays,phy_rug,mask=masque(1:iim,:))
	105
	106	!--- OCEAN TREATMENT -----------------------------------------------------------
	107	IF (prt_level>1) WRITE(lunout,*) 'Traitement de la glace oceanique'
	108
	109	! Input SIC file selection
	110	! Open file only to test if available
	111	IF ( NF90_OPEN(TRIM(famipsic),NF90_NOWRITE,nid)==NF90_NOERR ) THEN
	112	icefile=TRIM(famipsic)
	113	varname='sicbcs'
	114	ELSE IF( NF90_OPEN(TRIM(fcpldsic),NF90_NOWRITE,nid)==NF90_NOERR ) THEN
	115	icefile=TRIM(fcpldsic)
	116	varname='SIICECOV'
	117	ELSE IF ( NF90_OPEN(TRIM(fhistsic),NF90_NOWRITE,nid)==NF90_NOERR ) THEN
	118	icefile=TRIM(fhistsic)
	119	varname='pourc_sic'
	120	ELSE
	121	WRITE(lunout,*) 'ERROR! No sea-ice input file was found.'
	122	WRITE(lunout,*) 'One of following files must be availible : ',trim(famipsic),', ',trim(fcpldsic),', ',trim(fhistsic)
	123	CALL abort_gcm('limit_netcdf','No sea-ice file was found',1)
	124	END IF
	125	ierr=NF90_CLOSE(nid)
	126	IF (prt_level>=0) WRITE(lunout,*)'Pour la glace de mer a ete choisi le fichier '//TRIM(icefile)
	127
	128	CALL get_2Dfield(icefile,varname, 'SIC',interbar,ndays,phy_ice,flag=oldice)
	129
	130	ALLOCATE(pctsrf_t(klon,nbsrf,ndays))
	131	DO k=1,ndays
	132	fi_ice=phy_ice(:,k)
	133	WHERE(fi_ice>=1.0 ) fi_ice=1.0
	134	WHERE(fi_ice<EPSFRA) fi_ice=0.0
	135	pctsrf_t(:,is_ter,k)=pctsrf(:,is_ter) ! land soil
	136	pctsrf_t(:,is_lic,k)=pctsrf(:,is_lic) ! land ice
	137	IF (icefile==trim(fcpldsic)) THEN ! SIC=pICE*(1-LIC-TER)
	138	pctsrf_t(:,is_sic,k)=fi_ice(:)*(1.-pctsrf(:,is_lic)-pctsrf(:,is_ter))
	139	ELSE IF (icefile==trim(fhistsic)) THEN ! SIC=pICE
	140	pctsrf_t(:,is_sic,k)=fi_ice(:)
	141	ELSE ! icefile==famipsic ! SIC=pICE-LIC
	142	pctsrf_t(:,is_sic,k)=fi_ice-pctsrf_t(:,is_lic,k)
	143	END IF
	144	WHERE(pctsrf_t(:,is_sic,k)<=0) pctsrf_t(:,is_sic,k)=0.
	145	WHERE(1.0-zmasq<EPSFRA)
	146	pctsrf_t(:,is_sic,k)=0.0
	147	pctsrf_t(:,is_oce,k)=0.0
	148	ELSEWHERE
	149	WHERE(pctsrf_t(:,is_sic,k)>=1.0-zmasq)
	150	pctsrf_t(:,is_sic,k)=1.0-zmasq
	151	pctsrf_t(:,is_oce,k)=0.0
	152	ELSEWHERE
	153	pctsrf_t(:,is_oce,k)=1.0-zmasq-pctsrf_t(:,is_sic,k)
	154	WHERE(pctsrf_t(:,is_oce,k)<EPSFRA)
	155	pctsrf_t(:,is_oce,k)=0.0
	156	pctsrf_t(:,is_sic,k)=1.0-zmasq
	157	END WHERE
	158	END WHERE
	159	END WHERE
	160	nbad=COUNT(pctsrf_t(:,is_oce,k)<0.0)
	161	IF(nbad>0) WRITE(lunout,*) 'pb sous maille pour nb point = ',nbad
	162	nbad=COUNT(abs(sum(pctsrf_t(:,:,k),dim=2)-1.0)>EPSFRA)
	163	IF(nbad>0) WRITE(lunout,*) 'pb sous surface pour nb points = ',nbad
	164	END DO
	165	DEALLOCATE(phy_ice)
	166
	167	!--- SST TREATMENT -------------------------------------------------------------
	168	IF (prt_level>1) WRITE(lunout,*) 'Traitement de la sst'
	169
	170	! Input SST file selection
	171	! Open file only to test if available
	172	IF ( NF90_OPEN(TRIM(famipsst),NF90_NOWRITE,nid)==NF90_NOERR ) THEN
	173	sstfile=TRIM(famipsst)
	174	varname='tosbcs'
	175	ELSE IF ( NF90_OPEN(TRIM(fcpldsst),NF90_NOWRITE,nid)==NF90_NOERR ) THEN
	176	sstfile=TRIM(fcpldsst)
	177	varname='SISUTESW'
	178	ELSE IF ( NF90_OPEN(TRIM(fhistsst),NF90_NOWRITE,nid)==NF90_NOERR ) THEN
	179	sstfile=TRIM(fhistsst)
	180	varname='tsol_oce'
	181	ELSE
	182	WRITE(lunout,*) 'ERROR! No sst input file was found.'
	183	WRITE(lunout,*) 'One of following files must be availible : ',trim(famipsst),trim(fcpldsst),trim(fhistsst)
	184	CALL abort_gcm('limit_netcdf','No sst file was found',1)
	185	END IF
	186	ierr=NF90_CLOSE(nid)
	187	IF (prt_level>=0) WRITE(lunout,*)'Pour la temperature de mer a ete choisi un fichier '//TRIM(sstfile)
	188
	189	CALL get_2Dfield(sstfile,varname,'SST',interbar,ndays,phy_sst,flag=extrap)
	190
	191	!--- ALBEDO TREATMENT ----------------------------------------------------------
	192	IF (prt_level>1) WRITE(lunout,*) 'Traitement de l albedo'
	193	varname='ALBEDO'
	194	CALL get_2Dfield(falbe,varname,'ALB',interbar,ndays,phy_alb)
	195
	196	!--- REFERENCE GROUND HEAT FLUX TREATMENT --------------------------------------
	197	ALLOCATE(phy_bil(klon,ndays)); phy_bil=0.0
	198
	199	!--- OUTPUT FILE WRITING -------------------------------------------------------
	200	IF (prt_level>5) WRITE(lunout,*) 'Ecriture du fichier limit : debut'
	201
	202	!--- File creation
	203	ierr=NF90_CREATE("limit.nc",NF90_CLOBBER,nid)
	204	ierr=NF90_PUT_ATT(nid,NF90_GLOBAL,"title","Fichier conditions aux limites")
	205
	206	!--- Dimensions creation
	207	ierr=NF90_DEF_DIM(nid,"points_physiques",klon,ndim)
	208	ierr=NF90_DEF_DIM(nid,"time",NF90_UNLIMITED,ntim)
	209
	210	dims=(/ndim,ntim/)
	211
	212	!--- Variables creation
	213	ierr=NF90_DEF_VAR(nid,"TEMPS",NF90_FORMAT,(/ntim/),id_tim)
	214	ierr=NF90_DEF_VAR(nid,"FOCE", NF90_FORMAT,dims,id_FOCE)
	215	ierr=NF90_DEF_VAR(nid,"FSIC", NF90_FORMAT,dims,id_FSIC)
	216	ierr=NF90_DEF_VAR(nid,"FTER", NF90_FORMAT,dims,id_FTER)
	217	ierr=NF90_DEF_VAR(nid,"FLIC", NF90_FORMAT,dims,id_FLIC)
	218	ierr=NF90_DEF_VAR(nid,"SST", NF90_FORMAT,dims,id_SST)
	219	ierr=NF90_DEF_VAR(nid,"BILS", NF90_FORMAT,dims,id_BILS)
	220	ierr=NF90_DEF_VAR(nid,"ALB", NF90_FORMAT,dims,id_ALB)
	221	ierr=NF90_DEF_VAR(nid,"RUG", NF90_FORMAT,dims,id_RUG)
	222
	223	!--- Attributes creation
	224	ierr=NF90_PUT_ATT(nid,id_tim, "title","Jour dans l annee")
	225	ierr=NF90_PUT_ATT(nid,id_FOCE,"title","Fraction ocean")
	226	ierr=NF90_PUT_ATT(nid,id_FSIC,"title","Fraction glace de mer")
	227	ierr=NF90_PUT_ATT(nid,id_FTER,"title","Fraction terre")
	228	ierr=NF90_PUT_ATT(nid,id_FLIC,"title","Fraction land ice")
	229	ierr=NF90_PUT_ATT(nid,id_SST ,"title","Temperature superficielle de la mer")
	230	ierr=NF90_PUT_ATT(nid,id_BILS,"title","Reference flux de chaleur au sol")
	231	ierr=NF90_PUT_ATT(nid,id_ALB, "title","Albedo a la surface")
	232	ierr=NF90_PUT_ATT(nid,id_RUG, "title","Rugosite")
	233
	234	ierr=NF90_ENDDEF(nid)
	235
	236	!--- Variables saving
	237	ierr=NF90_PUT_VAR(nid,id_tim,(/(REAL(k),k=1,ndays)/))
	238	ierr=NF90_PUT_VAR(nid,id_FOCE,pctsrf_t(:,is_oce,:),(/1,1/),(/klon,ndays/))
	239	ierr=NF90_PUT_VAR(nid,id_FSIC,pctsrf_t(:,is_sic,:),(/1,1/),(/klon,ndays/))
	240	ierr=NF90_PUT_VAR(nid,id_FTER,pctsrf_t(:,is_ter,:),(/1,1/),(/klon,ndays/))
	241	ierr=NF90_PUT_VAR(nid,id_FLIC,pctsrf_t(:,is_lic,:),(/1,1/),(/klon,ndays/))
	242	ierr=NF90_PUT_VAR(nid,id_SST ,phy_sst(:,:),(/1,1/),(/klon,ndays/))
	243	ierr=NF90_PUT_VAR(nid,id_BILS,phy_bil(:,:),(/1,1/),(/klon,ndays/))
	244	ierr=NF90_PUT_VAR(nid,id_ALB ,phy_alb(:,:),(/1,1/),(/klon,ndays/))
	245	ierr=NF90_PUT_VAR(nid,id_RUG ,phy_rug(:,:),(/1,1/),(/klon,ndays/))
	246
	247	ierr=NF90_CLOSE(nid)
	248
	249	IF (prt_level>5) WRITE(lunout,*) 'Ecriture du fichier limit : fin'
	250
	251	DEALLOCATE(pctsrf_t,phy_sst,phy_bil,phy_alb,phy_rug)
	252
	253
	254	!===============================================================================
	255	!
	256	CONTAINS
	257	!
	258	!===============================================================================
	259
	260
	261	!-------------------------------------------------------------------------------
	262	!
	263	SUBROUTINE get_2Dfield(fnam, varname, mode, ibar, ndays, champo, flag, mask)
	264	!
	265	!-----------------------------------------------------------------------------
	266	! Comments:
	267	! There are two assumptions concerning the NetCDF files, that are satisfied
	268	! with files that are conforming NC convention:
	269	! 1) The last dimension of the variables used is the time record.
	270	! 2) Dimensional variables have the same names as corresponding dimensions.
	271	!-----------------------------------------------------------------------------
	272	USE netcdf, ONLY: NF90_OPEN, NF90_INQ_VARID, NF90_INQUIRE_VARIABLE, &
	273	NF90_CLOSE, NF90_INQ_DIMID, NF90_INQUIRE_DIMENSION, NF90_GET_VAR, &
	274	NF90_GET_ATT
	275	USE dimphy, ONLY : klon
	276	USE phys_state_var_mod, ONLY : pctsrf
	277	USE control_mod
[1785]	278	USE pchsp_95_m, only: pchsp_95
	279	USE pchfe_95_m, only: pchfe_95
	280	USE arth_m, only: arth
	281	USE indice_sol_mod
[1687]	282
	283	IMPLICIT NONE
	284	#include "dimensions.h"
	285	#include "paramet.h"
	286	#include "comgeom2.h"
	287	#include "iniprint.h"
	288	!-----------------------------------------------------------------------------
	289	! Arguments:
	290	CHARACTER(LEN=*), INTENT(IN) :: fnam ! NetCDF file name
	291	CHARACTER(LEN=10), INTENT(IN) :: varname ! NetCDF variable name
	292	CHARACTER(LEN=3), INTENT(IN) :: mode ! RUG, SIC, SST or ALB
	293	LOGICAL, INTENT(IN) :: ibar ! interp on pressure levels
	294	INTEGER, INTENT(IN) :: ndays ! current year number of days
	295	REAL, POINTER, DIMENSION(:, :) :: champo ! output field = f(t)
	296	LOGICAL, OPTIONAL, INTENT(IN) :: flag ! extrapol. (SST) old ice (SIC)
	297	REAL, OPTIONAL, DIMENSION(iim, jjp1), INTENT(IN) :: mask
	298	!------------------------------------------------------------------------------
	299	! Local variables:
	300	!--- NetCDF
	301	INTEGER :: ncid, varid ! NetCDF identifiers
	302	CHARACTER(LEN=30) :: dnam ! dimension name
	303	!--- dimensions
	304	INTEGER, DIMENSION(4) :: dids ! NetCDF dimensions identifiers
	305	REAL, ALLOCATABLE, DIMENSION(:) :: dlon_ini ! initial longitudes vector
	306	REAL, ALLOCATABLE, DIMENSION(:) :: dlat_ini ! initial latitudes vector
	307	REAL, POINTER, DIMENSION(:) :: dlon, dlat ! reordered lon/lat vectors
	308	!--- fields
	309	INTEGER :: imdep, jmdep, lmdep ! dimensions of 'champ'
	310	REAL, ALLOCATABLE, DIMENSION(:, :) :: champ ! wanted field on initial grid
	311	REAL, ALLOCATABLE, DIMENSION(:) :: yder, timeyear
	312	REAL, DIMENSION(iim, jjp1) :: champint ! interpolated field
	313	REAL, ALLOCATABLE, DIMENSION(:, :, :) :: champtime
	314	REAL, ALLOCATABLE, DIMENSION(:, :, :) :: champan
	315	!--- input files
	316	CHARACTER(LEN=20) :: cal_in ! calendar
	317	CHARACTER(LEN=20) :: unit_sic ! attribute unit in sea-ice file
	318	INTEGER :: ndays_in ! number of days
	319	!--- misc
	320	INTEGER :: i, j, k, l ! loop counters
	321	REAL, ALLOCATABLE, DIMENSION(:, :) :: work ! used for extrapolation
	322	CHARACTER(LEN=25) :: title ! for messages
	323	LOGICAL :: extrp ! flag for extrapolation
	324	LOGICAL :: oldice ! flag for old way ice computation
	325	REAL :: chmin, chmax
	326	INTEGER ierr
	327	integer n_extrap ! number of extrapolated points
	328	logical skip
	329
	330	!------------------------------------------------------------------------------
	331	!---Variables depending on keyword 'mode' -------------------------------------
	332	NULLIFY(champo)
	333
	334	SELECT CASE(mode)
	335	CASE('RUG'); title='Rugosite'
	336	CASE('SIC'); title='Sea-ice'
	337	CASE('SST'); title='SST'
	338	CASE('ALB'); title='Albedo'
	339	END SELECT
	340
	341
	342	extrp=.FALSE.
	343	oldice=.FALSE.
	344	IF ( PRESENT(flag) ) THEN
	345	IF ( flag .AND. mode=='SST' ) extrp=.TRUE.
	346	IF ( flag .AND. mode=='SIC' ) oldice=.TRUE.
	347	END IF
	348
	349	!--- GETTING SOME DIMENSIONAL VARIABLES FROM FILE -----------------------------
	350	IF (prt_level>5) WRITE(lunout,*) ' Now reading file : ',fnam
	351	ierr=NF90_OPEN(fnam, NF90_NOWRITE, ncid); CALL ncerr(ierr, fnam)
	352	ierr=NF90_INQ_VARID(ncid, trim(varname), varid); CALL ncerr(ierr, fnam)
	353	ierr=NF90_INQUIRE_VARIABLE(ncid, varid, dimids=dids); CALL ncerr(ierr, fnam)
	354
	355	!--- Read unit for sea-ice variable only
	356	IF (mode=='SIC') THEN
	357	ierr=NF90_GET_ATT(ncid, varid, 'units', unit_sic)
	358	IF(ierr/=NF90_NOERR) THEN
	359	IF (prt_level>5) WRITE(lunout,*) 'No unit was given in sea-ice file. Take percentage as default value'
	360	unit_sic='X'
	361	ELSE
	362	IF (prt_level>5) WRITE(lunout,*) ' Sea-ice cover has unit=',unit_sic
	363	END IF
	364	END IF
	365
	366	!--- Longitude
	367	ierr=NF90_INQUIRE_DIMENSION(ncid, dids(1), name=dnam, len=imdep)
	368	CALL ncerr(ierr, fnam); ALLOCATE(dlon_ini(imdep), dlon(imdep))
	369	ierr=NF90_INQ_VARID(ncid, dnam, varid); CALL ncerr(ierr, fnam)
	370	ierr=NF90_GET_VAR(ncid, varid, dlon_ini); CALL ncerr(ierr, fnam)
	371	IF (prt_level>5) WRITE(lunout, *) 'variable ', dnam, 'dimension ', imdep
	372
	373	!--- Latitude
	374	ierr=NF90_INQUIRE_DIMENSION(ncid, dids(2), name=dnam, len=jmdep)
	375	CALL ncerr(ierr, fnam); ALLOCATE(dlat_ini(jmdep), dlat(jmdep))
	376	ierr=NF90_INQ_VARID(ncid, dnam, varid); CALL ncerr(ierr, fnam)
	377	ierr=NF90_GET_VAR(ncid, varid, dlat_ini); CALL ncerr(ierr, fnam)
	378	IF (prt_level>5) WRITE(lunout, *) 'variable ', dnam, 'dimension ', jmdep
	379
	380	!--- Time (variable is not needed - it is rebuilt - but calendar is)
	381	ierr=NF90_INQUIRE_DIMENSION(ncid, dids(3), name=dnam, len=lmdep)
	382	CALL ncerr(ierr, fnam); ALLOCATE(timeyear(lmdep))
	383	ierr=NF90_INQ_VARID(ncid, dnam, varid); CALL ncerr(ierr, fnam)
	384	cal_in=' '
	385	ierr=NF90_GET_ATT(ncid, varid, 'calendar', cal_in)
	386	IF(ierr/=NF90_NOERR) THEN
	387	SELECT CASE(mode)
	388	CASE('RUG', 'ALB'); cal_in='360d'
	389	CASE('SIC', 'SST'); cal_in='gregorian'
	390	END SELECT
	391	IF (prt_level>5) WRITE(lunout, *)'ATTENTION: variable "time" sans attribut "calendrier" ' &
	392	// 'dans '//TRIM(fnam)//'. On choisit la valeur par defaut.'
	393	END IF
	394	IF (prt_level>5) WRITE(lunout, *) 'variable ', dnam, 'dimension ', lmdep, 'calendrier ', &
	395	cal_in
	396
	397
	398	!--- CONSTRUCTING THE INPUT TIME VECTOR FOR INTERPOLATION --------------------
	399	!--- Determining input file number of days, depending on calendar
	400	ndays_in=year_len(anneeref, cal_in)
	401
	402	!--- Time vector reconstruction (time vector from file is not trusted)
	403	!--- If input records are not monthly, time sampling has to be constant !
	404	timeyear=mid_months(anneeref, cal_in, lmdep)
	405	IF (lmdep /= 12) WRITE(lunout,*) 'Note : les fichiers de ', TRIM(mode), &
	406	' ne comportent pas 12, mais ', lmdep, ' enregistrements.'
	407
	408	!--- GETTING THE FIELD AND INTERPOLATING IT ----------------------------------
	409	ALLOCATE(champ(imdep, jmdep), champtime(iim, jjp1, lmdep))
	410	IF(extrp) ALLOCATE(work(imdep, jmdep))
	411
	412	IF (prt_level>5) WRITE(lunout, *)
	413	IF (prt_level>5) WRITE(lunout,*)'LECTURE ET INTERPOLATION HORIZ. DE ', lmdep, ' CHAMPS.'
	414	ierr=NF90_INQ_VARID(ncid, varname, varid); CALL ncerr(ierr, fnam)
	415	DO l=1, lmdep
	416	ierr=NF90_GET_VAR(ncid, varid, champ, (/1, 1, l/), (/imdep, jmdep, 1/))
	417	CALL ncerr(ierr, fnam)
	418	CALL conf_dat2d(title, imdep, jmdep, dlon_ini, dlat_ini, dlon, dlat, &
	419	champ, ibar)
	420
	421	IF (extrp) CALL extrapol(champ, imdep, jmdep, 999999., .TRUE., .TRUE., 2, &
	422	work)
	423
	424	IF(ibar .AND. .NOT.oldice) THEN
	425	IF(l==1 .AND. prt_level>5) THEN
	426	WRITE(lunout, *) '-------------------------------------------------------------------------'
	427	WRITE(lunout, *) 'Utilisation de l''interpolation barycentrique pour ',TRIM(title),' $$$'
	428	WRITE(lunout, *) '-------------------------------------------------------------------------'
	429	END IF
	430	IF(mode=='RUG') champ=LOG(champ)
	431	CALL inter_barxy(dlon, dlat(:jmdep-1), champ, rlonu(:iim), &
	432	rlatv, champint)
	433	IF(mode=='RUG') THEN
	434	champint=EXP(champint)
	435	WHERE(NINT(mask)/=1) champint=0.001
	436	END IF
	437	ELSE
	438	SELECT CASE(mode)
	439	CASE('RUG'); CALL rugosite(imdep, jmdep, dlon, dlat, champ, &
	440	iim, jjp1, rlonv, rlatu, champint, mask)
	441	CASE('SIC'); CALL sea_ice (imdep, jmdep, dlon, dlat, champ, &
	442	iim, jjp1, rlonv, rlatu, champint)
	443	CASE('SST', 'ALB'); CALL grille_m(imdep, jmdep, dlon, dlat, champ, &
	444	iim, jjp1, rlonv, rlatu, champint)
	445	END SELECT
	446	END IF
	447	champtime(:, :, l)=champint
	448	END DO
	449	ierr=NF90_CLOSE(ncid); CALL ncerr(ierr, fnam)
	450
	451	DEALLOCATE(dlon_ini, dlat_ini, dlon, dlat, champ)
	452	IF(extrp) DEALLOCATE(work)
	453
	454	!--- TIME INTERPOLATION ------------------------------------------------------
	455	IF (prt_level>5) THEN
	456	WRITE(lunout, *)
	457	WRITE(lunout, *)'INTERPOLATION TEMPORELLE.'
	458	WRITE(lunout, *)' Vecteur temps en entree: ', timeyear
	459	WRITE(lunout, *)' Vecteur temps en sortie de 0 a ', ndays
	460	END IF
	461
	462	ALLOCATE(yder(lmdep), champan(iip1, jjp1, ndays))
	463	skip = .false.
	464	n_extrap = 0
	465	DO j=1, jjp1
	466	DO i=1, iim
	467	yder = pchsp_95(timeyear, champtime(i, j, :), ibeg=2, iend=2, &
	468	vc_beg=0., vc_end=0.)
	469	CALL pchfe_95(timeyear, champtime(i, j, :), yder, skip, &
	470	arth(0., real(ndays_in) / ndays, ndays), champan(i, j, :), ierr)
	471	if (ierr < 0) stop 1
	472	n_extrap = n_extrap + ierr
	473	END DO
	474	END DO
	475	if (n_extrap /= 0) then
	476	WRITE(lunout,*) "get_2Dfield pchfe_95: n_extrap = ", n_extrap
	477	end if
	478	champan(iip1, :, :)=champan(1, :, :)
	479	DEALLOCATE(yder, champtime, timeyear)
	480
	481	!--- Checking the result
	482	DO j=1, jjp1
	483	CALL minmax(iip1, champan(1, j, 10), chmin, chmax)
	484	IF (prt_level>5) WRITE(lunout, *)' ',TRIM(title),' au temps 10 ', chmin, chmax, j
	485	END DO
	486
	487	!--- SPECIAL FILTER FOR SST: SST>271.38 --------------------------------------
	488	IF(mode=='SST') THEN
	489	IF (prt_level>5) WRITE(lunout, *) 'Filtrage de la SST: SST >= 271.38'
	490	WHERE(champan<271.38) champan=271.38
	491	END IF
	492
	493	!--- SPECIAL FILTER FOR SIC: 0.0<SIC<1.0 -------------------------------------
	494	IF(mode=='SIC') THEN
	495	IF (prt_level>5) WRITE(lunout, *) 'Filtrage de la SIC: 0.0 < Sea-ice < 1.0'
	496
	497	IF (unit_sic=='1') THEN
	498	! Nothing to be done for sea-ice field is already in fraction of 1
	499	! This is the case for sea-ice in file cpl_atm_sic.nc
	500	IF (prt_level>5) WRITE(lunout,*) 'Sea-ice field already in fraction of 1'
	501	ELSE
	502	! Convert sea ice from percentage to fraction of 1
	503	IF (prt_level>5) WRITE(lunout,*) 'Transformt sea-ice field from percentage to fraction of 1.'
	504	champan(:, :, :)=champan(:, :, :)/100.
	505	END IF
	506
	507	champan(iip1, :, :)=champan(1, :, :)
	508	WHERE(champan>1.0) champan=1.0
	509	WHERE(champan<0.0) champan=0.0
	510	END IF
	511
	512	!--- DYNAMICAL TO PHYSICAL GRID ----------------------------------------------
	513	ALLOCATE(champo(klon, ndays))
	514	DO k=1, ndays
	515	CALL gr_dyn_fi(1, iip1, jjp1, klon, champan(1, 1, k), champo(1, k))
	516	END DO
	517	DEALLOCATE(champan)
	518
	519	END SUBROUTINE get_2Dfield
	520	!
	521	!-------------------------------------------------------------------------------
	522
	523
	524
	525	!-------------------------------------------------------------------------------
	526	!
	527	FUNCTION year_len(y,cal_in)
	528	!
	529	!-------------------------------------------------------------------------------
	530	USE ioipsl, ONLY : ioget_calendar,ioconf_calendar,lock_calendar,ioget_year_len
	531	IMPLICIT NONE
	532	!-------------------------------------------------------------------------------
	533	! Arguments:
	534	INTEGER :: year_len
	535	INTEGER, INTENT(IN) :: y
	536	CHARACTER(LEN=*), INTENT(IN) :: cal_in
	537	!-------------------------------------------------------------------------------
	538	! Local variables:
	539	CHARACTER(LEN=20) :: cal_out ! calendar (for outputs)
	540	!-------------------------------------------------------------------------------
	541	!--- Getting the input calendar to reset at the end of the function
	542	CALL ioget_calendar(cal_out)
	543
	544	!--- Unlocking calendar and setting it to wanted one
	545	CALL lock_calendar(.FALSE.); CALL ioconf_calendar(TRIM(cal_in))
	546
	547	!--- Getting the number of days in this year
	548	year_len=ioget_year_len(y)
	549
	550	!--- Back to original calendar
	551	CALL lock_calendar(.FALSE.); CALL ioconf_calendar(TRIM(cal_out))
	552
	553	END FUNCTION year_len
	554	!
	555	!-------------------------------------------------------------------------------
	556
	557
	558	!-------------------------------------------------------------------------------
	559	!
	560	FUNCTION mid_months(y,cal_in,nm)
	561	!
	562	!-------------------------------------------------------------------------------
	563	USE ioipsl, ONLY : ioget_calendar,ioconf_calendar,lock_calendar,ioget_mon_len
	564	IMPLICIT NONE
	565	!-------------------------------------------------------------------------------
	566	! Arguments:
	567	INTEGER, INTENT(IN) :: y ! year
	568	CHARACTER(LEN=*), INTENT(IN) :: cal_in ! calendar
	569	INTEGER, INTENT(IN) :: nm ! months/year number
	570	REAL, DIMENSION(nm) :: mid_months ! mid-month times
	571	!-------------------------------------------------------------------------------
	572	! Local variables:
	573	CHARACTER(LEN=99) :: mess ! error message
	574	CHARACTER(LEN=20) :: cal_out ! calendar (for outputs)
	575	INTEGER, DIMENSION(nm) :: mnth ! months lengths (days)
	576	INTEGER :: m ! months counter
	577	INTEGER :: nd ! number of days
	578	!-------------------------------------------------------------------------------
	579	nd=year_len(y,cal_in)
	580
	581	IF(nm==12) THEN
	582
	583	!--- Getting the input calendar to reset at the end of the function
	584	CALL ioget_calendar(cal_out)
	585
	586	!--- Unlocking calendar and setting it to wanted one
	587	CALL lock_calendar(.FALSE.); CALL ioconf_calendar(TRIM(cal_in))
	588
	589	!--- Getting the length of each month
	590	DO m=1,nm; mnth(m)=ioget_mon_len(y,m); END DO
	591
	592	!--- Back to original calendar
	593	CALL lock_calendar(.FALSE.); CALL ioconf_calendar(TRIM(cal_out))
	594
	595	ELSE IF(MODULO(nd,nm)/=0) THEN
	596	WRITE(mess,'(a,i3,a,i3,a)')'Unconsistent calendar: ',nd,' days/year, but ',&
	597	nm,' months/year. Months number should divide days number.'
	598	CALL abort_gcm('mid_months',TRIM(mess),1)
	599
	600	ELSE
	601	mnth=(/(m,m=1,nm,nd/nm)/)
	602	END IF
	603
	604	!--- Mid-months times
	605	mid_months(1)=0.5*REAL(mnth(1))
	606	DO k=2,nm
	607	mid_months(k)=mid_months(k-1)+0.5*REAL(mnth(k-1)+mnth(k))
	608	END DO
	609
	610	END FUNCTION mid_months
	611	!
	612	!-------------------------------------------------------------------------------
	613
	614
	615	!-------------------------------------------------------------------------------
	616	!
	617	SUBROUTINE ncerr(ncres,fnam)
	618	!
	619	!-------------------------------------------------------------------------------
	620	! Purpose: NetCDF errors handling.
	621	!-------------------------------------------------------------------------------
	622	USE netcdf, ONLY : NF90_NOERR, NF90_STRERROR
	623	IMPLICIT NONE
	624	!-------------------------------------------------------------------------------
	625	! Arguments:
	626	INTEGER, INTENT(IN) :: ncres
	627	CHARACTER(LEN=*), INTENT(IN) :: fnam
	628	!-------------------------------------------------------------------------------
	629	#include "iniprint.h"
	630	IF(ncres/=NF90_NOERR) THEN
	631	WRITE(lunout,*)'Problem with file '//TRIM(fnam)//' in routine limit_netcdf.'
	632	CALL abort_gcm('limit_netcdf',NF90_STRERROR(ncres),1)
	633	END IF
	634
	635	END SUBROUTINE ncerr
	636	!
	637	!-------------------------------------------------------------------------------
	638
	639	#endif
	640	! of #ifdef CPP_EARTH
	641
	642	END SUBROUTINE limit_netcdf

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